<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    body{
      font: 12px "simhei", Arial, Helvetica, sans-serif;
      color: #666;
    }
    body>div{
      width: 1000px;
      background-color: rgba(248, 244, 244, 0.46);
      /*块级元素居中*/
      margin: 0 auto;
    }
    #t_l_div{
      width: 611px;
      height: 376px;
      float: left;
    }
    #t_r_div{
      width: 375px;
      height: 376px;
      float: right;
    }
    #t_div{
      overflow: hidden;/*解决高度为0的问题*/
      margin-bottom: 10px;
    }
    #t_div>div,#b_l_div,#b_r_div>div{
      background-color: #e8e8e8;
    }
    #b_l_div{
      width: 366px;
      height: 233px;
      float: left;
    }
    #b_r_div{
      float: right;
    }
    #b_div{overflow: hidden} /*解决高度为0的异常*/
    #b_r_div>div{
      width: 198px;
      height: 233px;
      float: left;
      margin-left: 10px;

    }
  </style>
</head>
<body>
<div>
  <div id="t_div">
    <div id="t_l_div"></div>
    <div id="t_r_div"></div>
  </div>

  <div id="b_div">
    <div id="b_l_div"></div>

    <div id="b_r_div">
      <div></div>
      <div></div>
      <div></div>
    </div>

  </div>
</div>
</body>
</html>